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首页> 外文期刊>Electric Power Components and Systems >Adjustable-speed Unsymmetrical Two-phase Induction Motor Drive for Photovoltaic Powered Air Conditioners
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Adjustable-speed Unsymmetrical Two-phase Induction Motor Drive for Photovoltaic Powered Air Conditioners

机译：光伏空调的可调速不对称两相感应电动机驱动器

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摘要

This article proposes a novel application of adjustable-speed one-phase induction motors in air conditioners powered by photovoltaic arrays. Employing the slip-frequency control scheme, an off-the-shelf one-phase induction motor is operated as an unsymmetrical two-phase induction motor. Maintaining certain control conditions, the unsymmetrical two-phase induction motor is made to behave like a symmetrical two-phase induction motor. This has the advantage of increasing the motor efficiency and reducing the torque pulsations inherent to unsymmetrical two-phase induction motors. The proposed control scheme reduces both initial and running costs of the proposed photovoltaic system. Initial cost is cut down by reducing the required size of the photovoltaic array through (ⅰ) limiting the motor current during both transient and dynamic phases of operation, (ⅱ) extracting maximum power from the photovoltaic array under various climate conditions by operating the photovoltaic array on the maximum power line, and (ⅲ) dispensing with the need for specially designed two-phase induction motors. Reduction in the running cost of the photovoltaic system is achieved by enhancing the motor efficiency through eliminating the backward component of the air gap flux. The article outlines a procedure for sizing the photovoltaic arrays. Simulation results of the system behavior during transient and dynamic phases confirm the capability of the proposed scheme.
机译：本文提出了一种可调速单相感应电动机在光伏阵列驱动的空调中的新型应用。利用转差频率控制方案，现成的一相感应电动机作为不对称两相感应电动机运行。在保持某些控制条件的情况下，使非对称两相感应电动机的行为类似于对称两相感应电动机。这具有提高电动机效率并减少非对称两相感应电动机固有的转矩脉动的优点。所提出的控制方案减少了所提出的光伏系统的初始和运行成本。通过减小光伏阵列所需的尺寸来减少初始成本，方法是：（ⅰ）在瞬态和动态运行阶段限制电动机电流，（current）在各种气候条件下通过运行光伏阵列从光伏阵列中提取最大功率（ⅲ）无需特别设计的两相感应电动机。通过消除气隙磁通的后向分量来提高电机效率，可以降低光伏系统的运行成本。本文概述了确定光伏阵列尺寸的过程。系统在瞬态和动态阶段的行为仿真结果证实了该方案的能力。

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